English Vocabulary - Involuntary. #englishvocabulary English Vocabulary - Involuntary. Involuntary refers to actions, movements, or responses that occur without conscious intention or control. These can include physiological responses, reflexes, or actions that are compelled by external circumstances rather than personal volition. Differences from voluntary actions include: - Lack of conscious control. - Often driven by instinct, reflex, or external forces. - Can be automatic or physiological. B